Hadith 236
´It was narrated that Anas bin Malik said:` "The Messenger of Allah said: 'May Allah cause to flourish a slave (of His) who hears my words and understands them, then he conveys them from me. There are those who have knowledge but no understanding, and there may be those who convey knowledge to those who may have more understanding of it than they do.'"
Hadith 746
´It was narrated that Ibn 'Umar said:` "Allah's Messenger prohibited prayer from being performed in seven places: The garbage dump, the slaughtering area, the graveyard, the commonly used road, the bathroom, in the area that camels rest at, and above the Ka'bah."